Pelvis and Perineum Flashcards
What is the pelvic outlet?
The inferior opening of the pelvis
What is the true pelvis formed by?
Pubis Ischium Coccyx Sacrum (PICS)
What is the false pelvis?
Lumbar vertebrae
Iliac Fossa
Abdominal wall
(LIA(R))
What type of joint is the sacroiliac joint?
Synovial plane joint
What type of joint is the pubic symphysis?
Secondary cartilaginous joint
How is the female greater pelvis described
Large and Broad
How is the male greater pelvis described?
Small and Narrow
How is the female pelvic inlet described?
Wide and Oval
How is the male pelvic inlet described?
Narrow and heart shaped
How is the female pelvic outlet described?
Wide
How is the male pelvic outlet described?
Narrow
What is the female suprapubic angle?
Obtuse
Greater than 90 degrees
What is the male suprapubic angle?
Acute
Less than 90 degress
What shape is the female obturator foramen?
Oval shaped
What shape is the male obturator foramen?
Rounded
Is the female acetabulum large or small?
Small
Is the male acetabulum large or small?
Large
What is the narrowest diameter of the pelvic inlet?
12cm
Anteroposterior
What is the narrowest diameter of pelvic outlet
11cm
Transverse
How is the female lesser pelvis described?
Flexible
Straight
How is the male lesser pelvis described?
Coccyx projects in and is immovable
What walls does the pelvic cavity have?
Antero-inferior
2 lateral walls
Posterior wall
What is the anterior-inferior formed by?
The bodies and the rami of the pubic bones
The pubic symphysis
What is the perineal body?
Central tendon of the perineum
An irregular fibromuscular mass
Where is the perineal body located?
At the junction of the urogenital and anal triangles
the central point of the perineum
What does the perineal mass act as in women?
A tear resistant body between the vagina and the external anal sphincter
Where does the perineal body lie in the male?
Between the bulb of the penis and the anus